canon收購
When
canon收購canon introduced the EOS 5D Mark II in late 2008, it was something of a cinematic revolution — its HD-capable, full-frame sensor granted access to the world of cinematic depth of field at a fraction of the usual price. However, a lot’s changed in the three and a half long years since the camera broke cover, plus now Nikon’s making a major play for DSLR video shooters with the bold new D800.
canon收購canon’s response? The new EOS 5D Mark III. It’s a full frame DSLR with a 22.3-megapixel sensor, a fast new processor, much-requested video fixes and additions, and a number of features ripped from the camera’s high-end brother, the EOS-1D X.
All these new features come at a cost, though — the camera will launch at the end of March for $3,499 for the body only, or $4,299 with
canon收購canon’s EF 24-105mm F/4 L lens. That’s significantly more than the Mark II, which will stay on sale and get an additional price cut next week. We got to spend some time with
canon收購canon’s latest and check out its new features — read on to find our first impressions of the 5D Mark III.
Hardware / design
Handling and shooting with the 5D Mark III will be familiar to anyone who has used
canon收購canon’s high-end DSLRs
Physically, this camera feels quite similar to the 5D Mark II, but
canon收購canon has added some refinements from the EOS 7D — the power switch has been moved up to the control dial on the top, there’s a dedicated video capture / Live View button, and a new multi-function button (for controlling features like the AE lock or one-touch RAW / JPEG settings) sits up near the shutter button. There’s also a new 3.2-inch display on the back, which is identical to that of the 1D X and contains 1,040,000 dots. The viewfinder has also been been upgraded — it now offers 100 percent coverage with a .71x magnification factor, up from the already-respectable 98 percent coverage found in the Mark II.
While these changes are notable, the actual act of handling and shooting with the camera will be very familiar to anyone who has used one of
canon收購canon’s recent higher-end DSLRs. It’s a solid and well-balanced device with easy access to every button or dial you’d like to access, and the new movie mode / Live View button is a massive improvement over the 5D Mark II’s somewhat difficult system. The Mark III is about as refined as you can get for an EOS camera without buying a 1D, and users of older of lower-end
canon收購canon DSLRs (like the 60D or Rebel T3i) will feel right at home if they gave this camera a shot.
The viewfinder in particular is a noticeable improvement over the Mark II and a necessary feature considering Nikon added 100 percent coverage to the D800. Considering the much less expensive 7D also features a 100 percent coverage viewfinder, it would have been a big omission for the Mark III not to get this upgrade. The sharp 3.2-inch LCD is another welcome change, particularly for those who shoot a lot of video or use Live View frequently when shooting still photos. The menu system has also been slightly streamlined, but will still be familiar to anyone who has used a
canon收購canon camera before. While the 5D Mark III might not look and feel terribly different at first blush, these changes make for a much improved shooting experience when compared with the Mark II.
Brand new internals
The DIGIC 5+ chip powering this camera is 17 times faster than the one in the 5D Mark II
The camera shares a lot of physical DNA with its older sibling, but it’s a whole different ballgame internally. The most important new components on board are the 22.3-megapixel, full-frame CMOS sensor and the DIGIC 5+ processor — these two pieces work together to provide a host of improvements in terms of photo and video quality, as well as in overall performance. While the sensor represents a only minor upgrade in raw pixel count, there are three changes that drive improved images and video: a gapless microlens design, an improved photodiode structure, and on-chip noise-reduction.
The first two changes relate to the individual photodiodes on the sensor — the new gapless microlens covers the diodes and lets in more light than the previous design, resulting in an improved signal to noise ration, The diodes themselves are now more efficient, resulting in an improved dynamic range. Lastly,
canon收購canon has built a proprietary on-chip noise reduction system that scrubs noise before the image is output from the sensor. As for the DIGIC 5+,
canon收購canon borrowed that from the 1D X as well (though the higher-end camera has two of them). It’s an upgrade over the DIGIC 5 that you’ll find in
canon收購canon’s newest point-and-shoot cameras, and a major contributor to the 5D Mark III’s improved speed — the company says the new chip is 17 times faster than the DIGIC 4 in the Mark II.
Video quality improvements
All the new technology under the hood has allowed
canon收購canon to answer the wishes of video shooters everywhere: the 5D Mark III doesn’t skip lines when downscaling the massive 22.3-megapixel output to HD resolution when recording video, which
canon收購canon claims will significantly decrease the dreaded moire effect that plagued the Mark II. Aliasing and CMOS skew, two other common visual knocks on the Mark II, have been improved as well.
canon收購canon showed us a moire test comparison between the Mark II and Mark III and it did show an impressive improvement — we’ll have to see how the camera performs out in the real world, but there’s hope that
canon收購canon’s moire issues may be a thing of the past.
Finally, a headphone jack!
Another video annoyance, the 4GB video file size limitation, has been done away with: now, when you reach the end of a 4GB file, the camera just automatically starts a new file.
canon收購canon has also finally added the much-requested headphone jack (making the Mark III the first EOS camera with this feature) and the ability to monitor and adjust audio levels while recording with the command dial on the back. That command dial also functions as a touch-sensitive scroll wheel for silent operation when shooting in video mode, but it otherwise retains the same “clicky” feeling when physically turning it. There’s also more flexibility in terms of shooting modes: 1080p footage can be shot at 24, 25, or 30 FPS and there’s a new 720p mode that offers 50 or 60 FPS.
Video ISO range is now 100 to 12,800 with 25,600 available as an extended option, and the new sensor and DIGIC 5+ combo promises a two-stop improvement in noise reduction. And in another theft straight from the 1D X, the IPB and ALL-i video codecs are included, which gives shooters more flexibility when choosing between smaller file sizes or higher quality, more editable footage. Unfortunately, there’s still no option for clean HDMI output (which allows the uncompressed video footage to be captured on an external recorder) — when we asked about this,
canon收購canon’s reps said “not yet.” However, it does sound like the HDMI signal output won’t downsample from 1080p to 480p when recording, thanks to the DIGIC 5+.
canon收購canon’s reps couldn’t say that with certainty, but they suspected it wouldn’t be an issue going forward.
Still photo enhancements
The new autofocus system is ripped straight from the 1D X
Lest we forget,
canon收購canon’s new processor and chip combo yields major benefits for still photographers as well. A major knock on the 5D Mark II was its nine-point autofocus system, which felt outdated even when the camera was introduced in 2008. With the Nikon D800 offering a 51-point system,
canon收購canon had to respond — and it did so by essentially cramming the 1D X’s autofocus system into a camera selling for half the price. The 5D Mark III offers 61 autofocus points, plus up to 41 cross-type sensors (depending on your lens). Exposure metering has also been revamped: the Mark III sports a new dual-layer, 63 zone system, compared to the single-layer 35 zone system found in the Mark II. The DIGIC 5+ also powers a nice improvement in shooting speed, as the Mark III can now shoot at 6 fps in RAW mode, up from 3.9 fps for the Mark II. The improved shooting speed is dramatic and immediately noticeable when using the camera — it won’t compare with the 1D X’s machine gun-like performance, but it equals that of the D800.
The Mark III should offer significantly reduced noise at the same ISO
canon收購canon’s also added some “silent shooting” options, which dramatically reduce the volume of the shutter when taking images. Even in silent mode, the camera shoots RAW at 3 fps and sounds about half as loud as it does in standard mode. Shutter lag has even been reduced, from 75 milliseconds for the Mark II down to 59 milliseconds on the Mark III — and this only trails the powerful 1D X by a tiny 4 milliseconds.
The 5D Mark III’s still photo ISO range now stretches from 50 to 25,600, with the option of pushing to 51,200 or 102,400 ISO included. While samples we saw at those settings exhibited a great deal of noise, they still could be potentially usable under certain circumstances (you just won’t want to make a 20 x 30-inch print). Outside of that extended range, however, the 5D Mark III should produce much less noise compared to the Mark II.
canon收購canon showed a pair of identical photos, one from the Mark II at 6,400 ISO and one from the Mark III at 25,600 ISO, and noise levels were nearly identical. We also saw images from each camera shot at the same ISO, and the Mark III’s improved noise performance was immediately obvious.
In another 1D X-inspired feature,
canon收購canon has added multiple card slots to the 5D Mark III. Unlike the 1D X (which holds two CompactFlash cards), the Mark III has a slot for one CompactFlash and one SD, and offers a variety of options for storing your work: you can have RAW and JPEG go to different cards, you can have whatever you shoot get stored to both cards as backup, or you can just increase your overall storage capacity without necessarily making duplicates.
Wrap-up
canon收購canon’s 5D Mark III retains
canon收購canon’s position as a (relatively) low-cost way to shoot full-frame photos or high-quality HD video, though it’s now significantly more expensive than the 5D Mark II it supplants. However, no one would have mistaken the Mark II as competitive with
canon收購canon’s 1D Mark III and 1Ds Mark III that were available when it launched. The 5D Mark III, on the other hand, feels like
canon收購canon pulled as many features as it possibly could from the new 1D X (including its autofocus system, video codecs, and processor) and fit them into a camera that is significantly less expensive. Compromises were made, particularly in the ISO range, shooting speed, and weatherproofing, but the new autofocus system and 6FPS shooting mode means that this camera’s target audience just expanded significantly. It’s no longer a camera best suited to studio work.
In fact, it wouldn’t surprise us at all to learn that the 1D X and 5D Mark III were designed in tandem. The 1D X will essentially replace two cameras when it’s released in late April, and had to be designed such that users of both the 1D Mark IV and 1Ds Mark III would find it a suitable replacement camera. And while the hierarchy
canon收購canon showed us has the 1D X at the top of the pyramid, the 5D Mark III doesn’t feel subordinate to
canon收購canon’s top of the line DSLR. It feels complementary, and we suspect that many professional users will consider both cameras — and that many could be completely happy with the 5D Mark III.
While it’s far too early to pass judgement on this camera,
canon收購canon has clearly been listening to user requests over the last three years, and they’ve hit on just about everything. However, with Nikon’s D800 looming,
canon收購canon didn’t have a choice in the matter — had the company come with anything less, it could have been in serious trouble. As it is,
canon收購canon and Nikon will likely spend the next year fighting it out for DSLR supremacy, and the increased competition means fans of both brands will likely be happy.
See how the 5D Mark III compares to the Mark II, 1D X, 1Ds Mark III and 1D Mark IV right here!
See how the 5D Mark III compares to the 1D X and Nikon’s D800 and D4 right here!
Jordan Oplinger contributed to this report.
▲台灣資安廠商匯智安全科技參加日本CEATEC展，推出全球首支整合檔案加密功能的無密碼認證金鑰SAMURAI Key（武士之鑰）。（圖／匯智提供）
記者蘇位榮／台北報導
隨著科技的快速進展，駭客技術不斷革新，其中密碼破解已成為資料侵入的首選策略。研究指出，大約有80%的資料外洩皆與密碼安全有關。一旦密碼被破解，不論個人或企業，資訊安全都會面臨巨大威脅。
台灣資安廠商匯智安全科技日前參加日本CEATEC消費電子展，推出全球首支整合檔案加密功能的無密碼認證金鑰SAMURAI Key（武士之鑰），不僅提供無密碼認證，更加強了資料加密保護，有效降低資料外洩的風險。
密碼外洩不僅可能導致隱私資料遭竊，更可能使企業遭受財務損失及品牌受損，甚至面臨法律訴訟。因此，加強資訊安全和密碼保護已成為當前急需解決的問題。
零信任（Zero Trust）因應而生，是一種資訊安全架構原則，核心理念是「永不信任，始終驗證」。它假設內部和外部的網路都是不可信的，並要求在授予任何訪問權限之前，對所有使用者和系統進行嚴格的身份驗證和授權。
Google積極推出Passkey無密碼登入技術就是基於零信任（Zero Trust）原則，Passkey技術會要求一些關於使用者的真實信息，例如指紋、面部辨識，以確保只有經過驗證的使用者可以訪問其帳戶或敏感信息，這種技術允許使用者僅透過生物特徵或個人設備解鎖來登入他們的帳戶，而無需輸入傳統的密碼。
根據Microsoft的研究數據，解決密碼問題能減少高達99.9%的身份驗證風險。面對此挑戰，SAMURAI Key不僅提供了解決方案，並加入了加密隨身碟和端點檔案加密功能，進一步保護了企業和個人資料。
匯智安全科技總經理鄭嘉信表示，Passkey技術與SAMURAI Key同樣基於FIDO2與Webauthn標準。隨著Passkey的興起，預期將有更多服務開始支援安全金鑰登入。
CEATEC是日本最大消費電子展，於10月17日至10月20日在千葉幕張舉行。匯智安全科技以「強化企業端點安全（Endpoint Security）」為主題，提出電腦遭非法登入與資料外洩的解決方案。企業客戶可以透過伺服器嚴謹控管SAMURAIKey，消除過往日本企業對遺失隨身碟會導致資料外洩的顧慮。日本電波株式會社、
canon收購canon、KDDI、OMRON、南星海運等都蒞臨攤位觀看動態展示。
匯智安全科技行銷企劃林蓉萱表示：「對於追求更高安全，要求或希望使用非手機登入方法的用戶，SAMURAI Key不僅滿足了他們的基本需求，而且超越了他們的期望，提供了加密保護資料的功能。」
除了參展外，「SAMURAI Key（武士之鑰）」也在日本群眾募資平台推出，12小時就成功達成募資金額，大受好評原因是Samurai key 滿足高端商務人士三個資安需要：一是取代密碼難記與洩漏；二是沒有遺失隨身碟造成資料洩漏的擔憂；三是加密筆電桌機檔案，確保隱私。受到日本人肯定與支持，也為台灣在全球資安的領域攻占一席之地。
鄭嘉信表示，設計Samurai Key之初，匯智安全科技同時將企業管理的資安需要考慮在內，把透過企業伺服器控管功能放入，扭轉了企業對 USB 隨身碟使用將導致資料外洩的擔憂。為進一步服務企業客戶，匯智安全科技可按照企業安全政策與需求進行 OEM 及 ODM 客製。透過整合「加密隨身碟」與「無密碼認證」，提供個人與企業更完整且全面的資安防護。
鄭嘉信補充說明：「不管是零信任，或是FIDO2，無密碼認證金鑰，對於一般使用者來說，都只是新穎的名詞，但卻是迫在眉睫必須解決的事。」匯智安全科技透過創新的技術和解決方案，正為全球資安市場樹立新的標準，並推動資訊安全向前發展。
canon收購
canon收購